1G6 Dr. C. P. Alexander on 



Rostrum yellow, brown in some specimens; palpi dark 

 brown. Antennse with the first scapal segment yellow, the 

 remainder dark brown. Front and anterior part of vertex 

 obscure yeUow; remainder of head dark brown. 



Mesonotum brown, the pleura obscure yellowish testaceous, 

 llalteres dark brown. Legs with the coxae and trochanters 

 yelhjwish testaceous ; femora dark brown, the tips rather 

 narrowly (Tl mm.) wliite; tibiie dark brown, the has s 

 narrowly (1'4 mm.) white, the tips rather Ijroadly (5-5'2 mm.) 

 white ; the broad brown tibial band is about twice the pale 

 tip; tarsi white; fore femora with two delicate bristles a 

 short distance beyond tlie base. Wings grey ; stigma dark 

 brown ; cell Sc and wing-tip darkened ; indistinct seams 

 along cord and vein Cu ; veins dark brown. Venation : ?-on 

 i?24.3 before the fork, a distance less than m. 



Abdominal tergites dark brown ; sternites obscure yellow. 

 Hab. Uganda. 



Holotype, S ■> ^labira Forest, Kyagwe Country, altitude 

 4000 feet, August 12, 1920 [R. A. Dummer). 

 Allotopotype, ? , August 10, 1920. 

 Paratupotijpes, 2 S '«> August 9, 1920. 

 " Along a stream in forest.^' 



There can be no doubt but that many African species of 

 Trentepohlia answer the brief characterization of T.fragillima 

 (Westwood). Mr. Edwards informs me that the type of the 

 latter is not now in the Hope Collections in the Oxford 

 Museum and may no longer be in existence. The present 

 s|>ecies differs from T. frayillima in the conspicuously larger 

 size and the coloration of the abdominal and thoracic 

 sternites. The degree of whitening of the tibial tips in 

 T. fragiJlima is not known. I take pleasure in naming this 

 fly after the collector, Mr. R. A. Dummer. 



Trentepohlia {Trentepohlia) nigricolor, sp. n. 



General coloration shiny black ; halteres yellow ; posterior 

 coxse testaceous yellow ; a single strong bristle on posterior 

 tibise before tips ; wings whitish subhyaline, cross-banded 

 with brown, the centre of cell R^ pale ; abdomen black, the 

 genital segment obscure reddish. 



Male. — Length 6 3 mm. ; wing 5*6 mm. 



Female. — Length about 6*5 mm. ; wing 5'7 mm. 



Rostrum, maxillary and labial palpi dark brown. Antenna? 

 dark brown throughout; flagellar segments cylindrical. 

 Head dark grey ; eyes of male large, the vertex between 

 them very narrow. 



